@sjslocombe I agree; once we've gotten into a groove, we often stick to it. Doctors are not often in an exploratory mood when they have patients to treat, and having their options suddenly limited due to one thing or another (e.g. patient's sensitivities) is surely disruptive. I feel bad that they make it seem like it's your fault, but it definitely isn't. I hope what you've now gotten works well for you.